Sectional boiler.



No. 727,814. PATENTED MAY-12, 1903..

L. R. LIBBY.

[SECTIONAL BOILER.

V APPLIOA'IION FILED APR. 7, 1902. I H0 MODEL. 1 3 BHBETB-SHEET 2L PATENTElS MAY 12, 1903.

L. R. LIBBY. SEGTIONAL BOILER. IPPLIOATION FILED APR. 7, 1902.

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Patented May 12, 1903.

LAWRENCE R. LIBBY, OF HARTFORD, CONNECTICUT.

SECTIONAL BOILER.

SPECIFICATION forming part of Letters Patent No. 727,814, dated May 12, 1903. Application filed April '7, 1902. Serial No. 101 ,629. N m l- A ing them'apart and finally cracking and break- To ctZZ whom it may concern/1 Be it known thatI, LAWRENCE R. LIBBY, a citizen of the United States of America, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Sectional Boilers for Steam or Hot Water, of whichth'e following is a specification.

My invention has for its object to produce a boiler of the class specified having features of novelty and advantage.

In the drawings, Figure 1 is a perspective view of my boiler having some parts broken away to show construction. Fig. 2 is a perspective view of the boiler-front. part a rear view of the boiler-front shown in Fig. 2 and in part a sectional view of the boilersections looking toward the front. Fig. 4 is a perspective View of the boiler, showing both vertical and horizontal sections.

This boiler is adapted for use either as a steam or hot-water boiler, or as both. It has the usual fire-box A, the steam-drum B, the hot-water drum 0, and the smoke-box E. The outer side Walls D D are hollow, forming a water-jacket. The inner faces of these side walls are corrugated, as shown at d, to allow for expansion and contraction Withont'warping or destroying the jackets. My boiler-secs tions G H K extend continuouslyfrom front to rear, each having the direct flues g.h"7a

communicating with the fire-box at the rear, as at g h M, and the return-fines g hlaopen ing at the rear into the smoke-box E. The. number of the boiler-sections to'be used can shown has many advantages over all sectional of course be varied, three being shown in the drawings. Between these sections and between the outer sections and the side walls there are clear spaces g g h 10 which extend for the full height of the sections, as clearly shown in Figsxl and 3. At the top the sections are bulged or enlarged on each side, as atm, so that each section very nearly but not quite contacts with the other and the outer sections with the sides D D. It will be seen that the steam-drum B is connected to each section and to the sides D D by rigid, inflexible, and steam-tight joints. It has been found in using other sectional furnaces where means are not provided for removing the soot, scale, &c., that after a time they collect and settle between the sections, spreadplastic material, such as asbestos.

Fig. 3 is in ing out the connections between the steamdIUIIIfiHd the boiler-sections. By my construction .I effectually dispose of these objections to the present type of sectional boilers, inasmuch as any soot or scale will drop into the fire-box. I propose to calk the openings between thesections at the top with a yielding fireproof material, as the asbestos rope R, and then to cover the whole boiler with a In order to support this plastic material on the side of the furnace,.I roughen the outer sides, as by ribs or a gridwork, as shown at N in Fig. 1.

The several-sections G H K andthe "side walls D D of the boiler fitinto recesses G H of an independent cast front P, being supported at p, these recesses forming a connection between the ,fiues. g g and it 7t. After the'side walls and theboiler-sections have been assembled in the front P the joints are sealed with cement or some suitable material.

The flames andheat pass in the direction of the arrows to the front of each section, up into boilers which are now in use. It has been found that the life of the present boilers of this class is, atthe outside, not more than six yearsyit being found that the continual expansion and contraction of the sections will in this time break the steam-joints connecting the several sections with thesteam-drum, this being due to the fact that'no allowance is made for the expansion. In my boilerfthis difficulty is obviated by the construction which has been herein described. Also in permitting the fire to shine on the sections to their full height I get a considerably-larger capacity with a lesser number of sections, and consequently at a greatly-reduced cost, than is possible with any of the types of sectional boilers now in use. The whole construction of my device is extremelysimple and efficient.

I claim as my improvement-- l. In a steam or hot-water boiler of the kind described, a series of sections extending from front to back of the boiler and arranged side by side, a direct and return flue wholly contained in each section, and a front for said boiler having independent chambers into which the direct and return lines open.

2. In a steam or hot-water boiler of the kind described, a series of independent sect ions extending from front to back of the boiler and arranged side by side, a direct and return flue wholly contained in each section, and the water-front for said boiler having independent chambers into which the direct and return lines open.

3. A boiler composed of sections extending from front to back thereof, each section being formed in a single piece and provided with a complete set of does.

4. A steam or hot-water boiler of the kind described, made of a series of sections complete in themselves and extending fromfront to back of the boiler, each sectionhaving a direct and return fine, and a front. for said boiler containing independent chambers into which the flues in each section open.

5. A steam or hot-water boiler of the kind described, comprising hollow side walls having their inner surfaces corrugated, and a series of independent sections arranged side by side between the side walls, said sections at the top and back approximately contacting with one another and with the side walls, but separated from one another and from the side walls by a substantial space from bottom to top, substantially as described.

6. A steam or hot-water boiler of the kind described, comprising hollow side walls for Water-heating spaces, the inner faces of said side Walls being corrugated, and a series of flue-containing independent boiler-sections each being complete in itself arranged side by side between the side walls, said sections at the top adapted approximately to contact with one another and with the side walls, but separated from one another and from the side walls by a substantial space from bottom to top.

7. A steam or hot-water boiler of the kind described, comprising a series of sections extending from front to back of the boiler, each section being separated from the other by a substantial space; a direct and return flue in each section; a front having chambers corresponding in number to the number of sections and registering with the flue-openings in the front of each section; and flanges on said front adapted to enter the spaces between the sections, all substantially as de' scribed and for the purposes set forth.

8. In combination in a steam or hot-water boiler of the kind described; the fire-box; the side walls having corrugated inner surfaces and roughened outer surfaces; aseries of sections arranged lengthwise of the boiler and located between the side walls; a front having chambers and flanges; and a direct flue in each section communicating with the firebox and extending toward the front of the section and opening into the chamber in the front; and a return -flue opening into the chamber at the front and extending to the rearof the section discharginginto the smokebox.

9. A boilercornposed of sections extending from front to back thereof, each section being made in one piece complete initself as to its fire and water spaces, substantially as described.

10. In a steam or hot-water boiler of the kind described in combination the hollow side walls, the series of independent flue-containing sections extending from front to rear of said boiler, and a front recessed to receive and support the front ends of the severalsections, all substantially as described.

11. In a steam or hot-water boiler of the kind described in combination the side walls, the independent fine-containing sections each complete in itself and located adjacent to but not in contact with one another and with the side walls, the spaces between the sections being in communication with the fire-box, all substantially as described.

12. In a steam or hot-water boiler of the kind described in combination theindependent sections each of which isa complete boiler in itself, and the hollow side walls extending from front to back and arranged side by side, said sections at the top and back approximately contacting with one another and with the side walls, and-ayielding fireproof backing closing the openings between the sections and between the sections and the side walls, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LAWRENCE R. LIBBY.

Witnesses:

H. E. HART, D. S. KREIMENDAHL. 

